Fix blink_perf.paint regression about tables

third_party/WebKit/Source/core/layout/LayoutTableSection.h

Index: third_party/WebKit/Source/core/layout/LayoutTableSection.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutTableSection.h b/third_party/WebKit/Source/core/layout/LayoutTableSection.h
index 52e5d5dc844c3b0fa61fe1717e71fe800053be86..f7d6d1d3b2fc2f11ef3f24c78632b15f8d343658 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTableSection.h
+++ b/third_party/WebKit/Source/core/layout/LayoutTableSection.h
@@ -218,10 +218,10 @@ class CORE_EXPORT LayoutTableSection final : public LayoutTableBoxComponent {
     return m_grid[row].row[effectiveColumn];
   }
   LayoutTableCell* primaryCellAt(unsigned row, unsigned effectiveColumn) {
-    if (effectiveColumn >= numCols(row))
+    Row& rowVector = m_grid[row].row;
+    if (effectiveColumn >= rowVector.size())
       return nullptr;
-    CellStruct& c = m_grid[row].row[effectiveColumn];
-    return c.primaryCell();
+    return rowVector[effectiveColumn].primaryCell();
   }
   const LayoutTableCell* primaryCellAt(unsigned row,
                                        unsigned effectiveColumn) const {